A hardness tester is necessary when heat treating metals to determine accurately if the correct Rc number is achieved. Also shown is a complete set of Meyer gage pins from .011 to 1.000 (-.0002) in .001 in steps. A very useful tool when attempting to determine a precise hole size. The wooden boxes contain micrometers (0 to 6 in); precision square set; & a 81 piece gage block set (grade B, +/-.000050).
